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$del=' at '; 'sanneschaap' dot $del dot 'gmail dot com' ¶
17 years ago
These functions let you wrap strings comparing to their actual displaying width of proportional font. In this case Arial, 11px. Very handy in some cases since CSS3 is not yet completely supported. 100 strings = ~5 ms



My old sheep word wrap function (posted at the bottom of this page, is kinda old dated and this one is faster and more accurate).



<?php

//the width of the biggest char @

$fontwidth = 11;



//each chargroup has char-ords that have the same proportional displaying width

$chargroup[0] = array(64);

$chargroup[1] = array(37,87,119);

$chargroup[2] = array(65,71,77,79,81,86,89,109);

$chargroup[3] = array(38,66,67,68,72,75,78,82,83,85,88,90);

$chargroup[4] = array(35,36,43,48,49,50,51,52,53,54,55,56,57,60,61,62,63, 69,70,76,80,84,95,97,98,99,100,101,103,104,110,111,112, 113,115,117,118,120,121,122,126);

$chargroup[5] = array(74,94,107);

$chargroup[6] = array(34,40,41,42,45,96,102,114,123,125);

$chargroup[7] = array(44,46,47,58,59,91,92,93,116);

$chargroup[8] = array(33,39,73,105,106,108,124);

    

//how the displaying width are compared to the biggest char width

$chargroup_relwidth[0] = 1; //is char @

$chargroup_relwidth[1] = 0.909413854;

$chargroup_relwidth[2] = 0.728241563;

$chargroup_relwidth[3] = 0.637655417;

$chargroup_relwidth[4] = 0.547069272;

$chargroup_relwidth[5] = 0.456483126;

$chargroup_relwidth[6] = 0.36589698;

$chargroup_relwidth[7] = 0.275310835;

$chargroup_relwidth[8] = 0.184724689;



//build fast array

$char_relwidth = null;

for ($i=0;$i<count($chargroup);$i++){

    for ($j=0;$j<count($chargroup[$i]);$j++){

        $char_relwidth[$chargroup[$i][$j]] = $chargroup_relwidth[$i];

    }

}



//get the display width (in pixels) of a string

function get_str_width($str){

    global $fontwidth,$char_relwidth;

    $result = 0;

    for ($i=0;$i<strlen($str);$i++){

        $result += $char_relwidth[ord($str[$i])];

    }

    $result = $result * $fontwidth;

    return $result;    

}



//truncates a string at a certain displaying pixel width

function truncate_str_at_width($str, $width, $trunstr='...'){

    global $fontwidth,$char_relwidth;        

    $trunstr_width = get_str_width($trunstr);

    $width -= $trunstr_width;

    $width = $width/$fontwidth;

    $w = 0;

    for ($i=0;$i<strlen($str);$i++){

        $w += $char_relwidth[ord($str[$i])];

        if ($w > $width)

            break;    

    }

    $result = substr($str,0,$i).$trunstr;

    return $result;

    // texas is the reason rules at 10am :)

}

?>
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